We plan to have WebSocket Support in the next Server SDK and in the next PUN update.
For the client SDKs we have on our page, things are a bit more tricky, as I don't want to add a reference to the WebSocket.dll to our general library. So I have to decide how we implement and package it for the LoadBalancing API from the Photon Unity Client SDKs. But in general, things are there and working.